:root {
  --bg: #0d1411;
  --panel: rgba(12, 24, 18, 0.84);
  --panel-border: rgba(152, 205, 121, 0.22);
  --text: #edf4e7;
  --muted: #9bb291;
  --accent: #b7ff6a;
  --accent-2: #4ec66f;
  --danger: #ff7a66;
  --shadow: rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(84, 142, 76, 0.22), transparent 30%),
    linear-gradient(135deg, #08100d, #0d1612 45%, #121713);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  touch-action: manipulation;
  padding-top: max(18px, env(safe-area-inset-top));
  padding-right: max(18px, env(safe-area-inset-right));
  padding-bottom: max(18px, env(safe-area-inset-bottom));
  padding-left: max(18px, env(safe-area-inset-left));
}

.shell {
  width: min(1400px, 100%);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
}

.hud,
.arena-wrap {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 50px var(--shadow);
}

.hud {
  padding: 22px 18px;
  border-radius: 24px;
}

.brand h1 {
  margin: 8px 0 12px;
  font-size: 2.2rem;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
}

.tagline,
.panel p {
  color: var(--muted);
  line-height: 1.55;
}

.panel {
  margin-top: 18px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.panel p {
  margin: 8px 0;
}

kbd {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: 0.92em;
}

.skill-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  margin: 10px 0;
}

.arena-wrap {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  min-height: 720px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  background:
    radial-gradient(circle at center, rgba(99, 156, 63, 0.08), transparent 34%),
    linear-gradient(180deg, #152218, #101713 60%, #0a100c);
}

.mobile-hud {
  position: absolute;
  top: max(12px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  display: none;
  gap: 8px;
  z-index: 2;
}

.mobile-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(6, 12, 8, 0.78);
  border: 1px solid rgba(183, 255, 106, 0.18);
  color: var(--text);
  font-size: 0.88rem;
}

.mobile-toggle {
  margin: 0 0 0 auto;
  min-height: 0;
  min-width: 0;
  padding: 8px 12px;
  background: rgba(6, 12, 8, 0.78);
  color: var(--text);
  border: 1px solid rgba(183, 255, 106, 0.18);
  box-shadow: none;
}

.touch-controls {
  position: absolute;
  inset: auto 0 0 0;
  display: none;
  justify-content: space-between;
  align-items: flex-end;
  padding-top: 18px;
  padding-right: max(18px, env(safe-area-inset-right));
  padding-bottom: max(18px, env(safe-area-inset-bottom));
  padding-left: max(18px, env(safe-area-inset-left));
  z-index: 2;
  pointer-events: none;
}

.touch-controls.is-right-handed {
  flex-direction: row-reverse;
}

.joystick-zone,
.skill-zone {
  pointer-events: auto;
}

.joystick-zone {
  width: 160px;
  height: 160px;
  display: grid;
  place-items: center;
}

.joystick-base {
  width: 138px;
  height: 138px;
  border-radius: 50%;
  background: rgba(10, 18, 13, 0.5);
  border: 1px solid rgba(183, 255, 106, 0.15);
  position: relative;
  box-shadow: inset 0 0 24px rgba(0, 0, 0, 0.25);
}

.joystick-stick {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 64px;
  height: 64px;
  margin-left: -32px;
  margin-top: -32px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(183, 255, 106, 0.9), rgba(78, 198, 111, 0.92));
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
}

.skill-zone {
  display: grid;
  gap: 12px;
}

.skill-btn {
  min-width: 108px;
  min-height: 56px;
  margin: 0;
  border-radius: 18px;
  background: rgba(8, 17, 11, 0.78);
  color: var(--text);
  border: 1px solid rgba(183, 255, 106, 0.18);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
}

.skill-btn-large {
  min-width: 128px;
  min-height: 74px;
}

.rotate-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding-top: max(24px, env(safe-area-inset-top));
  padding-right: max(24px, env(safe-area-inset-right));
  padding-bottom: max(24px, env(safe-area-inset-bottom));
  padding-left: max(24px, env(safe-area-inset-left));
  z-index: 5;
  background: rgba(5, 8, 6, 0.9);
}

.rotate-overlay:not(.hidden) {
  display: flex;
}

.rotate-card {
  width: min(360px, 100%);
  padding: 24px;
  border-radius: 24px;
  border: 1px solid rgba(183, 255, 106, 0.24);
  background: linear-gradient(180deg, rgba(21, 36, 25, 0.98), rgba(12, 20, 15, 0.98));
  text-align: center;
}

.rotate-card h2 {
  margin: 8px 0 10px;
}

.rotate-card p {
  color: var(--muted);
  line-height: 1.6;
}

.install-banner {
  position: absolute;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  top: calc(max(12px, env(safe-area-inset-top)) + 52px);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 20px;
  background: rgba(6, 12, 8, 0.88);
  border: 1px solid rgba(183, 255, 106, 0.18);
  z-index: 9;
}

.install-banner:not(.hidden) {
  display: flex;
}

.update-banner {
  position: absolute;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  top: calc(max(12px, env(safe-area-inset-top)) + 136px);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 20px;
  background: rgba(18, 34, 24, 0.94);
  border: 1px solid rgba(183, 255, 106, 0.22);
  z-index: 9;
}

.update-banner:not(.hidden) {
  display: flex;
}

.install-copy {
  min-width: 0;
}

.install-copy strong {
  display: block;
  margin-bottom: 4px;
}

.install-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.install-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.install-btn,
.install-dismiss {
  min-height: 44px;
  margin: 0;
  padding: 10px 14px;
  border-radius: 14px;
}

.install-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b140d;
}

.install-dismiss {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.install-help-card {
  max-width: 520px;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(5, 8, 6, 0.5);
}

.overlay.hidden {
  display: none;
}

.card {
  width: min(560px, 100%);
  padding: 28px;
  border-radius: 24px;
  border: 1px solid rgba(183, 255, 106, 0.24);
  background: linear-gradient(180deg, rgba(21, 36, 25, 0.96), rgba(12, 20, 15, 0.96));
  box-shadow: 0 22px 64px rgba(0, 0, 0, 0.42);
}

.card h2 {
  margin: 10px 0 10px;
  font-size: 2rem;
}

.card p {
  color: var(--muted);
  line-height: 1.6;
}

.choices {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

button {
  border: 0;
  border-radius: 16px;
  padding: 14px 18px;
  margin-top: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b140d;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.choice-btn {
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.choice-btn strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
}

@media (max-width: 1100px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .arena-wrap {
    min-height: auto;
  }
}

@media (max-width: 820px), (pointer: coarse) {
  body {
    padding: 0;
  }

  .shell {
    width: 100%;
    gap: 0;
    grid-template-columns: 1fr;
  }

  .hud {
    display: none;
  }

  .arena-wrap {
    border-radius: 0;
    min-height: 100vh;
    min-height: 100dvh;
    border: 0;
  }

  canvas {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    object-fit: cover;
  }

  .mobile-hud,
  .touch-controls {
    display: flex;
  }

  .install-banner:not(.hidden) {
    display: flex;
  }

  .update-banner:not(.hidden) {
    display: flex;
  }

  .mobile-hud {
    flex-wrap: wrap;
  }

  .mobile-toggle {
    margin-left: 0;
  }

  .card {
    padding: 22px;
  }

  .card h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 820px) and (orientation: portrait), (pointer: coarse) and (orientation: portrait) {
  .rotate-overlay {
    display: flex;
  }
}